13611389402 has 8 divisors (see below), whose sum is σ = 21987629076. Its totient is φ = 6282179712.

The previous prime is 13611389399. The next prime is 13611389447. The reversal of 13611389402 is 20498311631.

It can be written as a sum of positive squares in 2 ways, for example, as 12465499201 + 1145890201 = 111649^2 + 33851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261757463 + ... + 261757514.

Almost surely, 2^13611389402 is an apocalyptic number.

13611389402 is a deficient number, since it is larger than the sum of its proper divisors (8376239674).

13611389402 is a wasteful number, since it uses less digits than its factorization.

13611389402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523514992.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 13611389402 in words is "thirteen billion, six hundred eleven million, three hundred eighty-nine thousand, four hundred two".